Child car seat

ABSTRACT

There is provided a child car seat capable of preventing a seat body from being unintentionally moved to a turning position. The child car seat includes a pedestal and a seat body that can be slid with respect to the pedestal. A plurality of reclining positions and a turning position are included in a range within which the seat body can be slid. The seat body includes a retractable projecting member projecting toward the pedestal, and an operation member connected to the projecting member. The seat body can be held in the respective positions when the projecting member is engaged with the pedestal. An operation amount of the operation member, which is required for sliding the seat body between the reclining positions, is smaller than an operation amount of the operation member, which is required for sliding the seat body from the reclining position to the turning position.

FIELD OF THE INVENTION

The present invention relates to a child car seat mountable on a seat of a vehicle.

BACKGROUND ART

Various child car seats that are used when an infant is carried by passenger cars or the like have been proposed. For example, JP2002-301965A discloses a child car seat including a pedestal mountable on a seat of a vehicle, and a seat body supported on the pedestal. In this child car seat, the seat body can be slid with respect to the pedestal, and an inclination angle of the seat body with respect to the pedestal can be varied, i.e., the seat body can be reclined. In addition, when the seat body of this child car seat is moved up to an end of a range within which the seat body can be slid, the seat body can be turned with respect to the pedestal. Thus, not only an infant can be seated on the seat body so as to face forward in an advancing direction, but also the infant can be seated on the seat body so as to face backward in the advancing direction.

In the child car seat disclosed in JP2002-301965A, by operating a lever provided on the seat body, the seat body can be slid with respect to the pedestal. In order that the seat body is slid up to a position at which the seat body can be turned, it is necessary to further operate a lever provided on the pedestal. Thus, according to this child car seat, the seat body can be efficiently prevented from being unintentionally moved to the position at which the seat body can be turned.

The present invention is relevant to the child car seat disclosed in JP2002-301965A. A first object of the present is to provide a child car seat that can efficiently prevent a seat body from being unintentionally moved to a position at which the seat body can be turned, by means of a structure different from that of the child car seat disclosed in JP2002-301965A.

In addition, for example, JP2003-267099A discloses a child car seat including a child car seat body, and a support leg to be disposed between a floor surface of a vehicle and the child car seat body so as to support the child car seat body. In this child car seat, the support leg is configured to be swingable, in order to save a space for storage. In addition, the support leg has an inner tube and an outer tube so as to be extendable and contractable.

Recently, safety improvement has been further required. In the child car seat disclosed in JP2003-267099A, if the support leg is configured to be non-swingable and non-extendable, a play of the support leg is reduced as a whole. Thus, it is considered that the child car seat can be mounted more stably on a seat of a vehicle. However, in order to ensure versatility of the child car seat for various kinds of vehicles, the support leg should be actually configured to be extendable. On the other hand, when the support leg is configured to be non-swingable but extendable, there is a possibility that an external force might be intensively applied to a connection point between the outer tube and the inner tube for ensuring the extendable structure. Thus, it is necessary that the outer tube and the inner tube are securely fixed to each other.

In the child car seat disclosed in JP2003-267099A, the inner tube is fixed onto the outer tube by a screw that passes through the tube surface of the inner tube so as to extend thereinto. According to this method, although the inner tube can be securely fixed onto the outer tube, the fixing operation is complicated.

Thus, in the child car seat disclosed in JP2003-267099A, it can be considered that the screw is replaced with a mere pin. However, in this case, the inner tube cannot be securely fixed on the outer tube. In addition, when a large force is applied to a housing or the like that holds the pin, there is a possibility that the housing might be deformed so that the pin drops out of the inner tube. Alternatively, it can be considered that, not only the pin extends inside the inner tube, but also the pin penetrates through the inner tube. However, in this case, since the pin must pass through both of a pair of through-holes respectively formed in the opposite surfaces of the inner tube, the fixing operation is complicated.

The present invention has been made in view of the above circumstances. A second object of the present invention is to provide a highly rigid support leg easy to use, and a child car seat including the support leg.

DISCLOSURE OF THE INVENTION

The present invention is relevant to the child car seat disclosed in JP2002-301965A. A first object of the present is to provide a child car seat that can efficiently prevent a seat body from being unintentionally moved to a position at which a seat body can be turned, by means of a structure different from that of the child car seat disclosed in JP2002-301965A.

A second object of the present invention is to provide a highly rigid support leg easy to use, and a child car seat including the support leg.

A first child car seat of the present invention is a child car seat comprising: a pedestal to be mounted on a seat of a vehicle; and a seat body supported on the pedestal so as to be slidable with respect to the pedestal; wherein: a plurality of reclining positions at which the seat body is supported at different inclination angles, and a turning position at which the seat body can be turned on the pedestal, are included in a range within which the seat body can be slid; the seat body includes: a retractable projecting member projecting toward the pedestal; and an operation member connected to the projecting member, the operation member being capable of, when operated, adjusting a projecting amount of the projecting member; and the projecting member is configured to be engaged with the pedestal such that the projecting member can be held in the respective plurality of reclining positions and the turning position; and a first operation amount of the operation member, which is required for disengaging the engagement between the projecting member and the pedestal and for sliding the seat body between the plurality of reclining positions, is smaller than a second operation amount of the operation member, which is required for disengaging the engagement between the projecting member and the pedestal and for sliding the seat body from one of the plurality of reclining positions to the turning position. According to the first child car seat of the present invention, the seat body can be efficiently prevented from being moved up to the position at which the seat body can be turned.

In the first child car seat of the present invention, formed in the pedestal may be: a plurality of locking holes for receiving the projecting member, the locking holes being capable of holding the seat body at the respective plurality of reclining positions by receiving the projecting member; and a turning-position locking hole for receiving the projecting member, the turning-position locking hole being capable of holding the seat body at the turning position by receiving the projecting member; and a step may be formed between a surface of the pedestal in which the plurality of locking holes are formed and a surface of the pedestal in which the turning-position locking hole is formed. In the first child car seat of the present invention, the plurality of locking holes may be formed in a bottom surface of a recessed part formed in a surface of the pedestal in which the turning-position locking hole is formed.

In the first child car seat of the present invention, the seat body further may include an operation-amount adjusting mechanism having: a contacting and regulating member capable of being moved between: a first position at which the contacting and regulating member is in contact with the operation member so as to regulate the movement of the operation member, such that an operation amount of the operation member is not less than the first operation amount but less than the second operation amount; and a second position at which an operation amount of the operation member is allowed to be not less than the second operation amount; and a deregulating member connected to the contacting and regulating member, the deregulating member allowing, when operated, the movement of the contacting and regulating member from the first position to the second position.

In the first child car seat of the present invention, the operation member may be structured as an operation lever that can be swung about an axis in parallel with a movement path of the contacting and regulating member between the first position and the second position; the operation member may have a wall part located on a position opposed to the movement path, the wall part being capable of moving toward and moving away from the movement path in accordance with a swinging motion of the operation lever; and a portion of the wall part opposed to the first position may more project toward the movement path than a portion of the wall part opposed to the second position. In such a child car seat, the deregulating member may be structured as a deregulating lever that can be swung about an axis perpendicular to the swinging axis of the operation member.

In addition, in the first child car seat of the present invention, the deregulating member may be positioned in the vicinity of the operation member.

Further, in the first child car seat of the present invention, the operation-amount adjusting mechanism may further include a swingable holding lever that extends on the movement path of the contacting and regulating member between the first position and the second position; and the holding lever may be configured to allow the movement of the contacting and regulating member from the first position to the second position, and to hold the contacting and regulating member on the second position until the holding lever is subjected to an external force so as to be swung to a position outside the movement path. In such a child car seat, the operation member may include a disengaging part that is brought into contact with the holding lever, when the operation member is moved from a position at which the projecting member is located after having moved, by the first operation amount, from an initial position at which the projecting member is engaged with the pedestal so that the seat body is held on one of the plurality of reclining positions, to a position at which the projecting member is located after having moved from the initial position by the second operation amount; and the holding lever may be pressed by the disengaging part of the operation member so as to release the contacting and regulating member held on the second position. In addition, in such a child car seat, when the projecting member is engaged with the pedestal so that the seat body is fixed on the turning position, the operation member may be located at an intermediate position that is located in the course of the movement path along which the operation member is returned to the initial position; and the operation member may further include a stopper that is located, when the operation member is located at the intermediate position, on a position of the movement path of the contacting and regulating member between the first position and the second position so as to regulate the movement of the contacting and regulating member toward the first position. Further, in such a child car seat, formed in the pedestal may be: a plurality of locking holes for receiving the projecting member, the locking holes being capable of holding the seat body at the respective plurality of reclining positions by receiving the projecting member; and a turning-position locking hole for receiving the projecting member, the turning-position locking hole being capable of holding the seat body at the turning position by receiving the projecting member; and the turning-position locking hole may be formed as a bottomed hole having a bottom with which the projecting member is brought into contact.

Further, in the first child car seat of the present invention, a plane including an operation direction of the operation member and a plane including an operation direction of the deregulating member may be perpendicular to each other.

Further, in the first child car seat of the present invention, the operation member may be connected to the projecting member via a link mechanism; and a retracting amount of the projecting member may be dependent on an operation amount of the projecting member.

A second child car seat of the present invention is a child car seat comprising; a child car seat body to be mounted on a seat of a vehicle; and a support leg detachably attached to the child car seat body; wherein: the support leg includes a fitting part capable of being fitted in the child car seat body, and a leg part fixed to the fitting part at a constant angle with respect to the fitting part; the leg part includes: a first tubular member; a second tubular member at least a portion of which can be disposed in the first tubular member, the second tubular member being capable of being slid with respect to the first tubular member; and a positioning mechanism provided on the first tubular member, the positioning mechanism being configured to fix the second tubular member relative to the first tubular member; formed in the second tubular member are plural pairs of holes which are located in positions opposed to each other with intervals therebetween in a sliding direction of the second tubular member; each of the holes is formed as an elongated hole extending in a direction perpendicular to the sliding direction of the second tubular member; and the positioning mechanism includes: a housing fixed on the first tubular member; and a slider that can be slid with respect to the housing, the slider having a through-pin capable of passing through one pair of the plural pairs of holes so as to penetrate through the second tubular member. According to the second child car seat of the present invention, while maintaining the ease of use of the support leg, a play of the support leg can be reduced and a rigidity of the support leg can be improved.

In the second child car seat of the present invention, the child car seat body may include a bottom plate, and an accommodating member fixed on the bottom plate so as to accommodate the fitting part; the fitting part may include a fitting projection that is urged so as to project outward, the fitting projection being positioned in an area to be inserted into the accommodating member; and the accommodating member may have a through-hole for receiving the fitting projection of the fitting part, and the bottom plate has a fitting releasing part disposed on a position opposed to the through-hole, the fitting releasing part being capable of, when operated, pushing the fitting projection projecting into the through-hole into the accommodating member.

In addition, in the second child car seat of the present invention, the fitting releasing part may be connected to the bottom plate at a portion of an outer profile of the fitting releasing part, and may be disconnected from the bottom plate at a portion other than the portion of the outer profile, and the fitting releasing part may be warped with respect to the bottom plate so that the fitting releasing part can be brought into contact with the fitting projection.

Further, in the second child car seat of the present invention, the slider and the housing may be engaged with each other such that the slider and the housing are disengaged from each other by applying an external force in a sliding direction of the slider, and the through-pin is held so as to penetrate through the second tubular member.

Further, in the second child car seat of the present invention, a projection may be formed on one of the slider and the housing, and an engagement part engageable with the projection is formed on the other of the slider and the housing; and when the projection and the engagement part are engaged with each other, the through-pin may be held to penetrate through the second tubular member.

Further, in the second child car seat of the present invention, one end of the first tubular member may be fixed to the fitting part, and the housing of the positioning mechanism is fixed on the other end of the first tubular member; and by adjusting a length of the leg part by means of the positioning mechanism, an end of the second tubular member can be in contact with a floor surface of the vehicle.

Further, in the second child car seat of the present invention, the leg part may be fixed to the fitting part by welding.

A support leg of the present invention is a support leg to be attached to a child car seat body to be mounted on a seat of a vehicle so as to support the child car seat body, the support leg comprising: a fitting part capable of being fitted in the child car seat body; and a leg part fixed to the fitting part at a constant angle with respect to the fitting part; wherein the leg part includes: a first tubular member; a second tubular member at least a portion of which can be disposed in the first tubular member, the second tubular member being capable of being slid with respect to the first tubular member; and a positioning mechanism disposed on the first tubular member, the positioning mechanism being configured to fix the second tubular member relative to the first tubular member; formed in the second tubular member are plural pairs of holes which are located in positions opposed to each other with intervals therebetween in a sliding direction of the second tubular member; each of the holes is formed as an elongated hole extending in a direction perpendicular to the sliding direction of the second tubular member; and the positioning mechanism includes: a housing fixed on the first tubular member; and a slider that can be slid with respect to the housing, the slider having a through-pin capable of passing through one pair of the plural pairs of holes so as to penetrate through the second tubular member. According to the support leg of the present invention, while maintaining the ease of use of the support leg, a play of the support leg can be reduced and a rigidity of the support leg can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an embodiment of a child car seat (child car seat body) of the present invention.

FIG. 2 is a top view showing the child car seat in which seat body is in a forward facing condition.

FIG. 3 is a perspective view showing the child car seat mounted on a seat of a vehicle, with the seat body being in a backward facing condition.

FIG. 4 is a side view of the child car seat, for explaining a reclining mechanism of the seat body.

FIG. 5 is a side view showing the child car seat, for explaining a shifting condition of the seat body between the forward facing condition and the backward facing condition.

FIG. 6 is an exploded perspective view showing the seat body and a reclining base.

FIG. 7 is a perspective view showing the seat body.

FIG. 8 is a view showing a pedestal that is seen from the front.

FIG. 9 is a perspective view showing the pedestal.

FIG. 10 is a partial perspective view showing the child car seat, without showing a seat part of the seat body and a backrest part thereof.

FIG. 11 is a partial side view showing the child car seat that is seen from the lateral side.

FIG. 12 is a view for explaining a link structure accommodated in a standing part of the pedestal, the link mechanism being connected to a connection pin.

FIG. 13 is a perspective view showing the child car seat in the backward facing condition, with a cover being attached thereto.

FIG. 14 is a top view showing the cover.

FIG. 15 is a top view for explaining an operation of the cover attached to the child car seat.

FIG. 16 is a view for explaining operations of a lifting mechanism and an operation-amount adjusting mechanism.

FIG. 17 is a view corresponding to FIG. 16, for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 18 is a view corresponding to FIGS. 16 and 17, for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 19 is a view corresponding to FIGS. 16 to 18, for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 20 is a view showing an operation member that is seen from the bottom side.

FIG. 21 is a plan view for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 22 is a plan view corresponding to FIG. 21, for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 23 is a plan view corresponding to FIGS. 21 and 22, for explaining the operations of the lifting mechanism and the operation-amount adjusting mechanism.

FIG. 24 is a partial side view showing the child car seat.

FIG. 25 is a perspective view showing a support leg.

FIG. 26 is a perspective view showing the child car seat to which the support leg is attached, which is seen from the bottom side.

FIG. 27 is a sectional view schematically showing a connection portion between the support leg and the pedestal.

FIG. 28 is a partial front view showing a leg part of the support leg.

FIG. 29 is a view showing a section of FIG. 28 taken along the line A-A.

FIG. 30 is a view showing a section of FIG. 29 taken along the line B-B, with some constituent members being omitted.

FIG. 31 is a view showing a section of FIG. 28 taken along the line C-C, with some constituent elements being omitted.

EMBODIMENT OF CARRYING OUT THE INVENTION

An embodiment of the present invention will be described herebelow with reference to the drawings.

FIGS. 1 to 31 are views for explaining an embodiment of a child car seat (child seat, car seat) of the present invention. FIGS. 1 to 5 show the overall structure of the child car seat. As shown in FIGS. 1 to 5, a child car seat 10 in this embodiment includes, as a child car seat body 11, a pedestal 50 to be mounted on a seat 1 of a vehicle (such as an automobile), a reclining base 80 supported on the pedestal 50, and a seat body 20 supported, together with the reclining base 80, on the pedestal 50. As shown in FIG. 3, the child car seat 10 further includes a support leg 100 that is detachably attached to the pedestal 50 of the child car seat body 11. The support leg 100 extends up to a floor surface 3 of the vehicle supporting the vehicle seat 1, and supports a front part of the child car seat body 11 (pedestal 50) from below.

The pedestal 50 includes a base part 51 to be placed on a seat part la of the vehicle seat 1, as shown in FIG. 3, and a standing part 52 standing from the base part 51 so as to be opposed to a back part 1 b of the vehicle seat 1, as shown in FIG. 3. The base part 51 has a front surface 51 a, side surfaces (lateral surfaces) 51 b and a bottom surface 51 c (see, FIG. 1 and so on). On the other hand, the seat body 20 has a seat part 21 supported on the base part 51 such that the seat body 20 can be slid with respect to the base part 51 of the pedestal 50, and a backrest part 22 extending from the seat part 21.

As shown in FIG. 4, the reclining base 80 can be slid with respect to the pedestal 50 along a direction sd along a vertical plane. In addition, the seat body 20, together with the reclining base 80, can be slid with respect to the pedestal 50 along the direction sd along the vertical plane. As shown in FIG. 4, when the seat body 20 is slid with respect to the pedestal 50, an inclination angle of the seat body 20 with respect to the pedestal 50 varies. Namely, the seat body 20 on which an infant sits facing forward can be reclined.

Further, as shown in FIG. 5, the seat body 20 can be turned about a turning axis rd extending in the vertical plane, with respect to the reclining base 80 and the pedestal 50. As shown in FIG. 5, by turning the seat body 20 with respect to the pedestal 50, an infant can be put (seated or laid) on the child car seat 10, such that the infant faces backward. Herebelow, the condition of the seat body 20 shown by the solid line in FIG. 5 is referred to as “backward facing condition” of the seat body, and the condition of the seat body shown by the two-dot chain line in FIG. 5 is referred to as “forward facing condition” of the seat body.

In this specification, unless otherwise specified, the terms “front (forward)” and “back (backward)” mean “front” and “back” on the basis of a usual driving of a vehicle (see, FIGS. 2 and 3).

Herebelow, the child car seat body 11 is generally described at first, and then the respective parts of the child car seat 10 are further described.

[General Description of Child Car Seat Body]

At first, the seat body 20 of the child car seat 10 (child car seat body 11) is generally described. As described above, the seat body 20 includes the seat part 21 and the backrest part 22. The seat part 21 and the backrest part 22 are formed of frame members and cushion members fitted in the frame members. As shown in FIGS. 6 and 7, the seat body 20 further includes a disc 24 disposed on a lower part the seat part 21, and a guide piece 25 projecting downward from the disc 24. The disc 24 has a rail 24 a that extends substantially circumferentially. On a backside of the rail 24 a on the basis of an infant seated on the seat body 20, the rail 24 a is provided with a cutout 24 b. Namely, the rail 24 a terminates on the backside thereof. On the basis of an infant seated on the seat body 20, the guide piece 25 has a pair of flat side surfaces 25 a extending in parallel in the front and back direction, and arcuate side surfaces 25 b that connect the front ends and the back ends of the pair of flat side surfaces 25 a. Each arcuate side surface 25 b is formed as a part of a cylindrical surface, and has a circular arcuate profile in a cross-section of the guide piece 25.

As shown in FIGS. 1, 6 and so on, the backrest part 22 is provided with a connection guide 27 projecting backward, on the basis of an infant seated on the seat body 20. The connection guide 27 includes a proximal part 27 a projecting from the backrest part 22, and a bent part 27 b further extending from the proximal part 27 a in a bent manner, in a cross-section perpendicular to a movement path sd (see, FIG. 4) along which the connection guide is moved when the seat body 20 is slid. That is to say, the connection guide 27 is formed to have a hook-like shape. As can be understood from FIG. 2, the direction in which the proximal part 27 a of the connection guide 27 extends, and the direction in which the bent part 27 b of the connection guide 27 extends, are substantially perpendicular to each other, in the cross-section perpendicular to the movement path sd of the guide 27. While the seat body 20 is slid, the connection guide 27 passes through a groove 53 formed in the standing part 52 of the pedestal 50. As shown in FIG. 6 and so on, formed in the proximal part 27 a is a slit (elongated through-hole) 27 c extending along the movement path sd of the connection guide 27. The groove 53 formed in the pedestal 50 will be described in detail below.

As shown in FIG. 2, the backrest part 22 is provided with the connection guide 27 on one lateral side, and the connection guide 27 on the other lateral side, which are disposed apart from each other in a lateral direction (width direction) perpendicular to the front and back direction. The bent part 27 b of the connection guide 27 on one side (e.g., the right connection guide 27 in the plane of FIG. 2) is bent from the proximal part 27 a toward one side (e.g., right side in the plane of FIG. 2) of the lateral direction. The bent part 27 b of the connection guide 27 on the other side is bent from the proximal part 27 a toward the other side of the lateral direction. Namely, the bent parts 27 b of the pair of connection guides 27 extend from the respective proximal parts 27 a so as to be apart from each other along the lateral direction.

The seat body 20 contains therein a lifting mechanism 30 and an operation-amount adjusting mechanism 40, which are used when the seat body 20 is slid and turned with respect to the pedestal 50. As shown in FIGS. 6 and 7, the lifting mechanism 30 includes a pair of projecting members 32 projecting downward from the bottom surface 25 c of the guide piece 25, and an operation member 31 connected to the projecting members 32. In this embodiment, the operation member 31 is formed as a swingable operation lever, and the projecting members 32 are formed as pins (locking pins) that are retractable into the guide piece 25. By operating the operation member (operation lever) 31, a projecting amount of the projecting members 32 from the bottom surface 25 c of the guide piece 25 can be adjusted. In particular, in this embodiment, the operation member 31 is connected to the projecting members 32 through a link mechanism, such that a retracting amount of the projecting members 32 is dependent on an operation amount of the operation member 31. On the other hand, the operation-amount adjusting mechanism 40 is a mechanism that is brought into contact with the operation member 31 of the lifting mechanism 30 so as to regulate the operation amount (moving amount, swinging amount) of the operation member 31. The lifting mechanism 30 and the operation-amount adjusting mechanism 40 will be described in detail below.

Next, the reclining base 80 is further described. As shown in FIG. 10 and so on, the reclining base 80 is fitted on the circumference of the disc 24 of the seat body 20 so as to be positioned around the disc 24 and the guide piece 25 of the seat body 20. In addition, the reclining base 80 is slidably mounted on the pedestal 50. As a result, as shown in FIG. 4, the seat body 20, together with the reclining base 80, is slid with respect to the pedestal 50.

In addition, as shown in FIGS. 6, 10 and 11, the reclining base 80 has a flange part 81 that is engaged with the rail 24 a of the disc 24. The flange part 81 extends in a circular arcuate manner.

When the rail 24 a of the disc 24 is guided to the flange part 81 of the reclining base 80, the seat body 20 including the disc 24 can be turned with respect to the reclining base 80. As a result, the seat body 20 can be turned with respect to the pedestal 50 on which the reclining base 80 is mounted. As shown in FIGS. 6 and 10, the flange part 81 has a cutout 81 a formed in the backside thereof. As shown in FIGS. 10 and 11, when the seat body 20 is in the forward facing condition, the cutout 81 a of the flange part 81 and the cutout 24 b of the rail 24 a of the disc 24 face each other.

Further, as shown in FIG. 6, the reclining base 80 has a skirt part 82 extending downward toward the pedestal 50. As shown in FIG. 11, when the reclining base 80 is mounted on the pedestal 50, the skirt part 82 is located within a recess formed in the base part 51 of the pedestal 50.

Next, the pedestal 501 is described in detail. As shown in FIG. 3, the pedestal 50 can be mounted on the vehicle seat 1 by means of a seatbelt 5 of a vehicle, which has a waist belt 6 a and a shoulder belt 6 b. Thus, the standing part 52 of the pedestal 50 is provided with two lock-off devices 79 for clamping the shoulder belt 6 b of the seatbelt 5. The lock-off devices 79 are positioned away from each other in the lateral direction, so that the lock-off devices 79 can be adapted to two inclined directions of the shoulder belt 6 b. As shown in FIG. 3, the shoulder belt 6 b clamped by the lock-off devices 79 obliquely transverses the standing part 52 of the pedestal 50.

The pedestal 50 also has a waist-belt guide part 70 that guides the waist belt 6 a. The waist-belt guide part 70 will described in detail below.

As shown in FIGS. 8 and 9, a guide groove 55 extending along the front and back direction is formed in the base part 51 of the pedestal 50 in a center of the width direction (lateral direction). The guide groove 55 includes: a reclining guide part 55 a formed of a groove extending in the front and back direction, the groove having sidewalls in parallel with each other; and a turn guide part 55 b formed of a cylindrical recess disposed on a backside end of the reclining guide part 55 a. A width between the pair of sidewalls of the reclining guide part 55 a is determined such that the reclining guide part 55 a can be engaged with the flat side surfaces 25 a of the guide piece 25 of the seat body 20 whereby the seat body 20 can be slid with respect to the pedestal 50. In addition, a diameter of the cylindrical recess of the turn guide part 55 b is determined such that the turn guide part 55 b can be engaged with the arcuate side surfaces 25 b of the guide piece 25 of the seat body 20 whereby the seat body 20 can be turned with respect to the pedestal 50. That is to say, the turning axis line rd of the seat body 20 with respect to the pedestal 50 is defined by the turn guide part 55 b.

In this structure, since the guide piece 25 of the seat body 20 in the forward facing condition can be moved in the guide groove 55, the seat body 20 can be slid with respect to the pedestal 50. In addition, when the guide piece 25 of the seat body 20 is located in the turn guide part 55 b of the guide groove 55, the seat body 20 can be turned with respect to the pedestal 50. When the seat body 20 is slid or turned with respect to the pedestal 50, the bottom surface 25 c of the guide piece 25 of the seat body 20 slides on a bottom surface 55 c of the guide groove 55. In addition, similarly, when the reclining base 80 is slid together with the seat body 20 with respect to the pedestal 50, at least a portion of the skirt part 82 of the reclining base 80 moves in the guide groove 55.

As shown in FIGS. 8 and 9, the reclining guide part 55 a of the guide groove 55 is provided with a pair of right and left locking holes 56 a that receive the pair of aforementioned projecting members 32 of the seat body 20. In the drawings, the plurality of (three) pairs of lock holds 56 a are provided in the front and back direction. Meanwhile, the turn guide part 55 b is provided with a pair of right and left turning-position locking holes 56 b that receive the pair of projecting members 32. As shown in FIG. 8, a distance between the pair of right and left locking holes 56 a and a distance between the pair of right and left turning-position locking holes 56 b are the same with each other. However, the pair of locking holes 56 a and the pair of turning-position locking holes 56 b are offset from each other by the same dimensions in the opposite directions with respect a front and back axis line cd passing through the center in the width direction. That is to say, a distance 11 between the front and back axis line cd and the left locking hole 56 a, and a distance 11 between the front and back axis line cd and the right turning-position locking hole 56 b, are identical to each other. In addition, a distance 12 between the front and back axis line cd and the right locking hole 56 a, and a distance 12 between the front and back axis line cd and the left turning-position locking hole 56 b, are identical to each other.

Correspondingly to the offset of the locking holes 56 a and the turning-position locking holes 56 b, the aforementioned pair of projecting members 32 of the seat body 20 are configured to be located on offset positions with respect to the front and back axis line cd, when the seat body 20 is supported on the pedestal 50. As a result, when the pair of projecting members 32 of the seat body 20 are engaged with the locking holes 56 a, the seat body 20 is held in the forward facing condition. On the other hand, when the pair of projecting members 32 of the seat body 20 are engaged with the turning-position locking holes 56 b, the seat body 20 is held in a reversed condition (backward facing condition) shown by the solid line in FIG. 5. That is to say, in this embodiment, in a range within which the seat body 20 can be slid, there are included three reclining positions at which the seat body 20 is maintained at different inclination angles, and a turning position at which the seat body 20 can be turned with respect to the pedestal 50.

As shown in FIGS. 8 and 9, a step (difference) is formed between a surface 57 a in the guide groove 55 of the pedestal 50, in which the respective locking holes 56 a are formed, and the surface 55 c in the guide groove 55 of the pedestal 50, in which the turning-position locking holes 56 b are formed. In the guide groove 55, the bottom surface of the reclining guide part 55 a and the bottom surface of the turn guide part 55 b are formed as the single continuous surface 55 c. However, recessed parts 57 are formed in this single continuous surface 55 r, and the respective locking holes 56 a are formed in the bottom surfaces 57 a of the recessed parts 57. Thus, between the surface 57 a in which the respective locking holes 56 a are formed and the surface 55 c in which the turning-position locking holes 56 b are formed, there is the step whose height is the same as that of the recessed part 57.

As shown in FIGS. 8 to 11, a turn guide 58 is disposed on a lower part of the standing part 52 of the pedestal 50. When the guide piece 25 of the seat body 20 is moved to reach the turn guide part 55 b, the turn guide 58 is located on substantially the same circumferential position as that of the flange part 81 of the reclining base 80. When the seat body 20 on the turning position is tuned, the rail 24 a formed on the disc 24 of the seat body 20 is engaged not only with the flange part 81 of the reclining base 80 but also with the turn guide 58. As a result, the seat body 20 can be smoothly turned on the turning position.

As described above, the standing part 52 of the pedestal 50 has the groove 53 that receives the connection guides 27 disposed on the seat body 20. The seat body 20 is provided with the connection guide 27 on one side (e.g., the right connection guide in the plane of FIG. 2) and the connection guide 27 on the other side (e.g., the left connection guide in the plane of FIG. 2), which are apart from each other in the lateral direction. As shown in FIG. 2, formed in the standing part 52 are the groove 53 on one side (e.g., the right groove in the plane of FIG. 2) to be engaged with the connection guide 27 on the one side, and the groove 53 on the other side to be engaged with the connection guide 27 on the other side, which are away from each other in the lateral direction. As can be understood from FIG. 2, in a cross-section of the groove 53 perpendicular to the longitudinal direction thereof (direction along the movement path sd of the connection guide 27), each groove 53 extends in a bent manner correspondingly to the shape of the connection guide 27.

As shown in FIGS. 8 and 9, in an upward facing end surface (upper end surface) 52 a of the standing part 52, both of a portion of the groove 53 for accommodating the proximal part 27 a and a portion of the groove 53 for accommodating the bent part 27 b are opened. As a result, as shown in FIG. 1, for example, an upper portion of each connection guide 27 of the seat body 20, which passes through the groove 53 of the pedestal 50, passes the openings in the upper end surface 52 a of the standing part 52 so as to extend outside the groove 53. Further, as shown by the two-dot chain line in FIG. 5, when the seat body 20 is slid up to the turning position, the connection guide 27 of the seat body can exit outside from the groove 53. Thus, the engagement between the connection guide 27 and the groove 53 is released (disengaged), so that the seat body 20 can be turned with respect to the pedestal 50.

Also in a forward facing face (front face) 52 b of the standing part 52, all the portion of the groove 53 is opened. As a result, in this embodiment, as shown in FIG. 1, for example, the opposed ends of the connection guide 27 can extend outside the groove 53.

As shown in FIG. 8 and so on, in each groove 53, there is disposed a connection pin 60 that extends in the lateral direction (width direction) perpendicular to the front and back direction. The connection pin 60 can penetrate through a slit 27 c formed in the proximal part 27 a of the connection guide 27 being passing through the groove 53. The connection pin 60 is supported so as to be movable along the lateral direction, whereby the connection pin 60 can take a position at which the connection pin 60 penetrates through the slit 27 c formed in the proximal part 27 a of the connection guide 27, and a position at which the connection pin 60 is retracted into the standing part 52.

As shown in FIG. 11, a first cam 61 is disposed such that the first cam 61 can project into the guide groove 55 from an opening formed in a position that is further backward the turn guide part 55 b. In addition, a second cam 62 is disposed such that the second cam 62 can project into the guide groove 55 from an opening formed in the reclining guide part 55 a.

The first cam 61 and the second cam 62 are connected to each other by a link such that, when one cam stands so that a distal end thereof projects to the guide groove 55, the other cam is retracted from the guide groove 55. The first cam 61 is further connected to a bell crank 63 provided in the pedestal 50 via a link.

The first cam 61 is urged by a tension spring 64 so as to project into the guide groove 55. When the guide piece 25 of the seat body 20 is moved into the turn guide part 55 b, the first cam 61 is pressed by the skirt part 82 of the reclining base 80 and is pushed into the guide groove 55. On the other hand, when the guide piece 25 of the seat body 20 is moved to the reclining guide part 55 a, the second cam 62 is pressed by the skirt part 82 of the reclining base 80 and is pushed into the guide groove 55.

As shown in FIG. 12, operation arms 65 each having two arms are rotatably provided in the standing part 52 of the pedestal 50. Elongated holes 65 a and 65 b are formed in each arm. The one elongated hole 65 a is connected to the bell crank 63 via a link, and the other elongated hole 65 b is connected to the connection pin 60. Each operation arm 65 is configured to be rotated so as to draw the connection pin 60 into the standing part 52 of the pedestal 50, when the bell crank 63 is swung so as to move the link downward.

As described above, the support leg 100 is detachably attached to the pedestal 50. The structure of the pedestal 50 relating to the support leg 100 will be described in detail below along with the support leg 100.

In the child car seat 10 (child car seat body 11) as structured above, by lifting up the projecting members (locking pins) 32 from the locking holes 56 a of the pedestal 50, the seat body 20 can be slid from one reclining position to another reclining position. At this time, due to the urging force of the tension spring 64, each connection pin 60 extends into the groove 53 via the link mechanism so as to penetrate through the slit 27 c of the connection guide 27 being passing through the groove 53. As a result, the guide piece 25 of the seat body 20 is directed to the guide groove 55 of the pedestal 50, and the connection guide 27 of the seat body 20 is directed to the groove 53 and the connection pin 60 of the pedestal 50. Thus, the seat body 20 can be smoothly slid with respect to the pedestal 50. In particular, in this embodiment, the connection guide 27 has not only the proximal part 27 a but also the bent part 27 b that extends from the proximal part 27 a in a bent manner, whereby the connection guide 27 can be located on a predetermined position in the groove 53. Therefore, the sliding motion of the seat body 20 with respect to the pedestal 50 can be further smoothened and stabilized. In this manner, the inclination angle of the backrest part 22 of the seat body 20 with respect to the pedestal 50 can be stably and smoothly varied.

Then, when the projecting members (locking pins) 32 are lifted from the locking holes 56 a of the pedestal 50, and the seat body 20 is slid from the reclining position to the turning position, the skirt part 82 of the reclining base 80, which is slid together with the seat body 20 with respect to the pedestal 50, is brought into contact with the first cam 61 projecting into the guide groove 55 so as to press the first cam 61. As a result, when the seat body 20 reaches the turning position, the swinging operation of the first cam 61 is transmitted to the connection pins 60 via the bell crank 63, the operation arms 65 and the links, whereby the connection pins 60 are retracted into the standing part 52 of the pedestal 50. Thus, in dependence on the movement of the seat body 20 toward the turning position, as shown by the two-dot chain line in FIG. 5, the connection guides 27 can exit from the grooves 53. Since the connection guides 27 are not arrested by the guide grooves 53 any more, the seat body 20 having moved up to the turning position can be turned about the turning axis line rd.

Further, as described above, the pairs of locking holes 56 a, the pair of turning-position locking holes 56 b and the projecting members 32 are offset from each other with respect to the front and back axis line cd passing through the center in the lateral direction. In addition, until the seat body 20 having been slid up to the turning position is reversed so as to take the backward facing condition, the projecting members 32 do not enter the turning-position locking holes 56 b. Thus, the seat body 20, which has been slid up to the turning position, can be easily and reliably turned until the seat body 20 takes the backward facing condition.

In addition, when the projecting members (locking pins) 32 are lifted from the locking holes 56 a of the pedestal 50, and the seat body 20 in the backward facing condition is reversed and then moved up to the reclining position, the connection guides 27 again enter the grooves 53 from the upward facing end surface 52 a of the standing part 52. Since the connection guide 27 has not only the proximal part 27 a but also the bent part 27 b extending from the proximal part 27 a in a bent manner, the connection guide 27 can be directed to a predetermined position in the groove 53. At this time, due to the urging force of the tension spring 64, the first cam 61 projects into the guide groove 55 and the connection pins 60 project into the grooves 53. Since the connection guides 27 having the bent parts 27 b are located on the predetermined positions in the grooves 53, the connection pins 60 can smoothly penetrate through the slits 27 c of the connection guides 27.

As shown in FIG. 13, in this embodiment, the child car seat 10 (child car seat body 11) further includes a cover 85 that can be detachably attached to the standing part 52. The cover 85 can cover the standing part 52 which is exposed by the movement of the backrest part 22 when the seat body 20 is turned on the pedestal 50. Namely, the cover 85 is attached to the standing part 52 of the child car seat 10 (child car seat body 11) in the backward facing condition. As shown in FIG. 14, attachment tools 86 a and 86 b are disposed on respective end portions of a rear surface of the cover 85. The standing part 52 of the pedestal 50 has attachment tools (not shown) corresponding to these attachment tools 86 a and 86 b. The cover 85 can be detachably attached to the standing part 52 by means of these attachment tools 86 a and 86 b.

As is illustrated, the cover 85 is configured to cover the upward facing end surface 52 a of the standing part 52 and the forward facing surface 52 b of the standing part 52. As described above, the grooves 53 are opened in the upper end surface 52 a of the standing part 52. In addition, in the front surface 52 b of the standing part 52, the other ends of the grooves 53 are opened and the lock-off devices 79 are disposed. Further, the shoulder belt 6 b of the seat belt 5 clamped by the lock-off devices 79 obliquely transverses the front surface 52 b of the standing part 52. The cover 85 covers the grooves 53, the lock-off devices 79 and the shoulder belt 6 b. That is to say, the grooves 53, the lock-off devices 79 and the shoulder belt 6 b can be prevented from being exposed to an infant seated on the child car seat 10 in the backward facing condition.

According to such a cover 85, an accident, such as an object being caught by the opening grooves 53, the lock-off devices 79, the shoulder belt 6 b and so on, can be efficiently prevented. In addition, the cover 85 is excellent in design, and increases safety feeling when the child car seat 10 is used.

Further, as shown in FIG. 14, the cover 85 is provided, in an area of a surface that is exposed when the cover 85 is attached to the standing part 52, the area being positioned on the end surface 52 a when the cover 85 is attached to the standing part 52, with a sheet-like member 87 on one side and a sheet-like member 87 on the other side which are away from each other in the lateral direction. The sheet-like member 87 on the one side (e.g., the right sheet-like member in the plane of FIG. 14) has a rectangular profile whose three edges (e.g., an upper edge, a lower edge, and a right edge) other than an edge on the one side (e.g., left side) in the lateral direction are sewed on the body part. Similarly, the sheet-like member 87 on the other side has a rectangular profile whose three edges other than an edge on the other side in the lateral direction are sewed on the body part. As a result, as shown in FIG. 14, the sheet-like member 87 on the one side is opened to the one side in the lateral direction, and the sheet-like member 87 on the other side is opened to the other side in the lateral direction.

These sheet-like members 87 has a function for informing a user of failing of detachment of the cover 85. To be specific, as shown in FIG. 15, when the seat body 20 is turned from the backward facing condition toward the forward facing condition without the cover 85 being detached, the connection guide 27 on the other side is caught by an opening portion 87 a of the sheet-like member 87 on the one side, or the connecting guide 27 on the one side is caught by an opening portion 87 a of the sheet-like member 87 on the other side. When the sheet-like members 87 are formed of a thick fabric, this function of the sheet-like members 87 can be more efficiently exerted. According to the cover 85 having such sheet-like members 87, the seat body 20 can be prevented from being turned, with the cover 85 being attached to the standing part 52. Thus, damage of the seat body 20, in particular, damage of the connection guides 27 and the cushion members can be efficiently prevented.

[Lifting Mechanism and Operation-amount adjusting mechanism]

Next, the lifting mechanism 30, the operation-amount adjusting mechanism 40, and structures and operations relating to these mechanisms are described in detail.

The lifting mechanism 30 is a mechanism for lifting up the projecting members (locking pins) 32. As described above, the lifting mechanism 30 includes the pair of projecting members (locking pins, pins) 32 projecting downward from the bottom surface 25 c of the guide piece 25, and the operation member (operation lever) 31 connected to the projecting members 32. As shown in FIGS. 10 and 11, the operation member 31 is swingably connected to a support base 33 disposed on the disc 24. A swinging axis line d1 of the operation member 31 extends in the lateral direction perpendicular to the front and back direction. Inside the guide piece 25, there is provided a reclining cam 34 that can be swung about a swinging axis line d2 (see, FIGS. 16 to 19) extending in the lateral direction. The reclining cam 34 is connected to the operation member 31 via a link member 35, so that the reclining cam 34 is configured to be swung in dependence on the swinging motion of the operation member 31.

The pair of projecting members 32 projecting from the guide piece 25 are connected to each other at upper portions thereof, and are held by the reclining cam 34. As shown in FIGS. 16 to 19, the projecting members 32 are supported in an elongated hole of the reclining cam 34, whereby the projecting members 32 penetrate through the bottom surface 25 c of the guide piece 25 in certain positions. A tension spring 36 is disposed between the reclining cam 34 and the disc 24, whereby the reclining cam 34 is urged to be swung toward the pedestal 50. Namely, the projecting members 32 are urged from the guide piece 25 toward the pedestal 50.

In this manner, the operation member 31 is connected to the projecting members 32 via the link mechanism, such that a retracting amount of the projecting member 32 can be dependent on an operation amount of the operation member 31.

As described above, when the projecting members 32 are engaged with the locking holes 56, the seat body 20 is maintained at the reclining position. Meanwhile, when the projecting members 32 is engaged with the turning-position locking holes 56 b, the seat body 20 is maintained in the backward facing condition at the turning position. The recessed parts 57 a are formed in the bottom surface 55 c of the guide groove 55, and the locking holes 56 a are formed in the bottom surfaces 57 a of the recessed parts 57. On the other hand, the turning-position locking holes 56 b are formed in the bottom surface 55 c of the guide groove 55.

Thus, a lifting amount of the projecting members 32 which is required for disengaging the engagement between the projecting members 32 and the pedestal 50 and for sliding the seat body 20 between the plurality of reclining positions, in other words, an amount of lifting the projecting members 32 located within the locking holes 56 a up to the bottom surfaces 57 a of the recessed parts 57, is smaller than a lifting amount of the projecting member 32 which is required for disengaging the engagement between the projecting members 32 and the pedestal 50 and for sliding the seat body 20 from one of the plurality of reclining positions to the turning position, in other words, an amount of lifting the projecting members 32 located within the locking holes 56 a up to the bottom surface 55 c of the guide groove 55. That is to say, a first operation amount of the operation member 31, which is required for disengaging the engagement between the projecting members 32 and the pedestal 50 and for sliding the seat body 20 between the plurality of reclining positions, is smaller than a second operation amount of the operation member 31, which is required for disengaging the engagement between the projecting members 32 and the pedestal 50 and for sliding the seat body 20 from one of the plurality of reclining positions to the turning position.

Next, the structure of the operation-amount adjusting mechanism 40 is described in detail. The operation-amount adjusting mechanism 40 is a mechanism that is brought into contact with the operation member 31 of the lifting mechanism 30 so as to regulate an operation amount (moving amount, swinging amount) of the operation member 31.

The operation-amount adjusting mechanism 40 includes: a contacting and regulating member 42 which can be brought into contact with the operation member 31 of the lifting mechanism 30; and a deregulating member 41 connected to the contacting and regulating member 42, the deregulating member 41 being configured to move the contacting and regulating member 42 when operated. The contacting and regulating member 42 can be moved between: a first position pa1 (see, FIG. 21) at which the contacting and regulating member 42 is in contact with the operation member 31 of the lifting mechanism 30 so as to regulate the movement of the operation member 31, such that an operation amount of the operation member 31 is not less than the first operation amount but is less than the second operation amount; and a second position pa2 (see, FIG. 22) at which an operation amount of the operation member 31 is allowed to be not less than the second operation amount.

When operated, the deregulating member 41 allows the movement of the contacting and regulating member 42 from the first position pa1 to the second position pa2.

As shown in FIGS. 21 and 22, in this embodiment, the deregulating member 41 is structured as an operation lever that can be swung about a swinging axis line d3 perpendicular to the swinging axis line d1 of the operation member 31 of the lifting mechanism 30. An elongated hole 41 a is formed in the deregulating member 41. On the other hand, in this embodiment, the contacting and regulating member 42 is structured as an elongated rod-like member that extends through the elongated hole 41 a of the deregulating member 41. In addition, formed in the support base 33 is an elongated hole 33 a extending in parallel with the swinging axis line d1 of the operation member 31 of the operation mechanism 30. The contacting and regulating member 42 also extends through the elongated hole 33 a of the support base 33. Thus, the contacting and regulating member 42 can be moved on a linear movement path mr (see, FIGS. 20 and 21) along the elongated hole 33 a of the support base 33. When the deregulating member 41 is swung, the contacting and regulating member 42 is located on a position at which the elongated hole 41 a of the deregulating member 41 and the elongated hole 33 a of the support base 33 intersect with each other, when observed along the swinging axis line d3 of the deregulating member 41. The deregulating member 41 is urged by a not-shown torsion spring or the like, from a position at which the contacting and regulating member 42 is located on the second position pa2, which is shown in FIG. 22, toward a position at which the contacting and regulating member 42 is located on the first position pa1, which is shown in FIG. 21.

As shown in FIGS. 16 to 19, the deregulating member 41 is positioned in the vicinity of the operation member 31 of the lifting mechanism 30, and the contacting and regulating member 42 is positioned so as to be covered by the operation member 31 of the lifting mechanism 30 from above. On the other hand, as shown in FIGS. 20 and 21, the operation member 31 of the lifting mechanism 30 has a wall part 37 located on a position opposed to the movement path mr. The wall part 37 can be brought into contact with and separated from the movement path mr in accordance with the swinging motion of the operation member 31. FIG. 20 shows the operation member 31 from below, when the projecting member 32 is received in the locking hole 56 a (when the operation member 31 is located on an initial position). In FIG. 21, a profile of the wall part 37 of the operation member 31 opposed to the contacting and regulating member 42 is shown by the dotted line. As shown in FIGS. 20 and 21, a part (hereinafter also referred to as “first stopper part”) 37 a of the wall part 37 opposed to the first position pa1 on the movement path mr is located nearer to the movement path mr than a part (hereinafter also referred to as “second stopper part”) 37 b of the wall part 37 opposed to second position pa2 on the movement path mr.

Owing to such a structure, when the contacting and regulating member 42 is located on the first position pa1, the operation member 31 can be swung from the initial condition in which the projecting members 32 of the lifting mechanism 30 are engaged with any one pair of the locking holes 56 a, which is shown in FIG. 16, until the first stopper part 37 a of the wall part 37 of the operation member 31 comes into contact with the contacting and regulating member 42. As shown in FIG. 17, when the operation member 31 is swung until the first stopper part 37 a of the wall part 37 is brought into contact with the contacting and regulating member 42, the projecting member 32 can be lifted above the bottom surface 57 a of the recessed part 57, but cannot be lifted up to a position equal to the height of the bottom surface 55 b of the guide groove 55. Thus, when the contacting and regulating member 42 is located on the first position pa1, the operation member 31 can be operated (moved) with an operation amount (moving amount) that is not less than the first operation amount of the operation member 31 required for sliding the seat body 20 between the plurality of reclining positions, but is less than the second operation amount of the operation member 31 required for sliding the seat body 20 from one of the plurality of reclining positions to the turning position.

On the other hand, when the contacting and regulating member 42 is located on the second position pa2, the operation member 31 can be swung from the initial condition shown in FIG. 16 until the second stopper part 37 b of the wall part 37 of the operation member 31 comes into contact with the contacting and regulating member 42. As shown in FIG. 18, when the operation member 31 is swung until the second stopper part 37 b of the wall part 37 is brought into contact with the contacting and regulating member 42, the projecting member 32 can be lifted above the bottom surface 55 b of the guide groove 55. Thus, when the contacting and regulating member 42 is located on the second position pa2, the operation member 31 can be operated (moved) with an operation amount (moving amount) that is not less than the second operation amount of the operation member 31 required for sliding the seat body 20 from one of the plurality of reclining positions to the turning position.

As shown in FIGS. 21 and 22, the operation amount adjusting member 40 further includes a swingable holding lever 43 that extends above the movement path mr of the contacting and regulating member 42 from the first position pa1 to the second position pa2. The holding lever 43 is structured as a latchet mechanism that allows the movement of the contacting and regulating member 42 from the first position pa1 toward the second position pa2, and holds the contacting and regulating member 42 on the second position pa2 until the holding lever 43 is subjected to an external force so as to be swung to a position outside the movement path mr of the contacting and regulating member 42.

The holding lever 43 can be swung about a swinging axis line d4 that is perpendicular to the movement path mr of the contacting and regulating member 42 and is in parallel with the swinging axis d3 of the deregulating member 41. The holding lever 43 is urged by a not-shown torsion spring or the like in the direction shown by the arrow in FIG. 21. Namely, the holding lever 43 is urged so as to extend across the movement path mr of the contacting and regulating member 42. The holding member 43 has a guide surface 43 a, which is inclined at a small angle with respect to the movement path mr from the first position pa1 of the contacting and regulating member 42 to the second position pa2 thereof, and a holding surface 43 b, which extends substantially perpendicularly to the movement path mr from the first position pa1 of the contacting and regulating member 42 to the second position pa2 thereof. Thus, when the deregulating member 41 is operated so that the contacting and regulating member 42 is moved from the first position pa1 toward the second position pa2, the holding lever 43 is once swung to a position outside the movement path mr of the contacting and regulating member 42. Thus, only by operating the deregulating member 41, the contacting and regulating member 42 can be moved up to the second position pa2. When the contacting and regulating member 42 is moved to reach the second position pa2, the holding lever 43 extends on the movement path mr of the contacting and regulating member 42 by means of the urging force from the not-shown torsion spring. As a result, the holding surface 43 b of the holding member 43 comes into contact with the contacting and regulating member 42 so as to regulate the movement of the contacting and regulating member 42. Thus, against the urging force to the operation member 31, the contacting and regulating member 42 is maintained on the second position pa2.

The holding lever 43 further includes a projecting part 43 c projecting into the movement path of the operation member 31. On the other hand, the operation member 31 includes a disengaging part 38 which can be brought into contact with the projecting part 43 c of the holding lever 43. When the operation member 31 is moved from a position (first disengagement position) at which the projecting member 32 is located after having moved, by the first operation amount, from the initial position at which the projecting member 32 is received in the locking hole 56 a (position shown in FIG. 16), to a position (second disengagement position) at which the projecting member 32 is located after having moved from the initial position by the second operation amount, the disengaging member 38 of the operation member 31 is brought into contact with the projecting part 43 c of the holding lever 43. As shown in FIG. 18, by the further swinging motion of the operation member 31, the disengaging member 38 presses the projecting part 43 c so that the holding lever 43 is swung against the urging force to the position outside the movement path mr of the contacting and regulating member 42. After the holding lever 43 has been swung to the position outside the movement path mr of the contacting and regulating member 42, the contacting and regulating member 42 can be moved from the second position pa2 toward the first position pa1.

Each turning-position locking hole 56 b is formed as a bottomed hole having a bottom. As shown in FIG. 19, when the projecting member 32 is inserted into the turning-position locking hole 56 b, the projecting member 32 comes into contact with the bottom of the turning-position locking hole 56 b. On the other hand, each locking hole 56 a is formed as a bottomed hole (which is illustrated as an example) having a bottom that is located below the bottom of the turning-position locking hole 56 b, or formed as a hole without bottom. As can be understood from the comparison between FIG. 19 and FIG. 16, the projecting member 32 inserted in the turning-position locking hole 56 b is located above the position of the projecting member 32 that is inserted in the locking hole 56 a. That is to say, when the projecting member 32 is inserted in the turning-position locking hole 56 b, the projecting member 32 does not completely project from the guide piece 25 by the bottom of the turning-position locking hole 56 b serving as a stopper, whereby the operation member 31 is not returned up to the initial position (position shown in FIG. 16). Thus, when the projecting members 32 are engaged with the turning-position locking holes 56 b of the pedestal 50 so that the seat body 20 is fixed on the turning position, the operation member 31 is located on an intermediate position (position shown in FIG. 19, for example) between the second disengagement position (position shown in FIG. 18, for example) and the initial position (position shown in FIG. 16).

On the other hand, the operation member 31 further includes a third stopper part (stopper) 37 c that is located, when the operation member 31 is located on the intermediate position, on (across) the movement path mr of the contacting and regulating member 42 on a position between the first position pa1 and the second position pa2 so as to regulate the movement of the contacting and regulating member 42 toward the first position. Specifically, as shown in FIG. 20, the third stopper part 37 c is formed between the first stopper part 37 a and the second stopper part 37 b, as a surface extending from the wall part 37 toward the movement path mr along a direction perpendicular to the movement path mr of the contacting and regulating member 42. As can be understood from FIGS. 19 and 20, in this embodiment, unless the operation member 31 is substantially returned to the initial position, the contacting and regulating member 42 cannot pass the third stopper part 37 c so as be returned to the first position pa1.

Next, an operation of the projecting members (locking pins) 32 with the use of the lifting member 30 and the operation-amount adjusting mechanism 40 is described.

At first, operations of the lifting mechanism 30 and the operation-amount adjusting mechanism 40 when the reclining angle of the seat body 20 is varied are described. When the reclining angle of the seat body 20 is varied, the seat body 20 is moved from one reclining position to another reclining position. In this case, the operation member (operation lever) 31 of the lifting mechanism 30, which is in the initial position (position shown in FIG. 16), is swung as much as possible within the swingable range. In other words, the operation member 31 is swung to the position at which the contacting and regulating member 42 of the operation-amount adjusting mechanism 40, which is located on the first position pa1, is in contact with the first stopper part 37 a of the operation member 31 so that further movement of the operation member 31 is regulated. As shown in FIG. 17, in accordance with the operation of the operation member 31, the distal end of the projecting member 32 exits from the locking hole 56 a and is lifted above the bottom surface 57 a of the recessed part 57. Thus, the seat body 20 can be slid with respect to the pedestal 50 until the projecting member 32 is located above another locking holes 56 a. Due to the urging force of the tension spring 36 (see, FIGS. 10 and 11), when the external force is removed from the operation member 31, the projecting member 32 automatically projects from the guide piece 25. Thus, by engaging the projecting member 32 with another locking hole 56 a, the seat body 20 can be reclined.

Next, operations of the lifting mechanism 30 and the operation-amount adjusting mechanism 40 when the seat body 20 is shifted from the forward facing condition to the backward facing condition are described. When the seat body 20 is shifted from the forward facing condition to the backward facing condition, the seat body 20 is moved from one reclining position to the turning position, and is then turned (reversed) by 180° on the turning position.

At first, by swinging the deregulating member 41 of the operation-amount adjusting mechanism 40, the contacting and regulating member 42 is moved from the first position pa1 to the second position pa2. Then, the operation member 31 of the lifting mechanism 30, which is in the initial position (position shown in FIG. 16), is swung as much as possible within the swingable range. In other words, the operation member 31 is swung to the position at which the contacting and regulating member 42 of the operation-amount adjusting mechanism 40, which is located on the second position pa2, is in contact with the second stopper part 37 b of the operation member 31 so that further movement of the operation member 31 is regulated. As shown in FIG. 18, the distal end of the projecting member 32 exits from the locking hole 56 a and is lifted above the bottom surface 55 c of the guide groove 55. Thus, the movement of the seat body 20 to the turning position becomes possible.

As described above, when the seat body 20 is moved to the turning position, the connection pins 60 of the pedestal 50 are retracted into the standing part 52, and the connection guides 27 of the seat body 20 exit from the grooves 53. Thus, the turning motion of the seat body 20 with respect to the pedestal 50 becomes possible.

In addition, as described above, since the pair of turning-position locking holes 56 b are offset from the front and back axis line cd, it is not until the seat body 20 is reversed that the projecting members 32 are opposed to the turning-position locking holes 56 b. Thus, when the seat body 20 starts to move from any one of the reclining positions toward the turning position so that the projecting members 32 are opposed to the bottom surface 55 c of the guide groove 55, the user may separate his/her hand from the operation member 31. When the seat member 20 takes the backward facing condition on the turning position, the projecting members 32 automatically enter the turning-position locking holes 56 b, so that the seat body 20 can be fixed in the backward facing condition.

In this manner, the condition of the seat body 20 can be shifted from the forward facing condition to the backward facing condition.

According to this embodiment, an operation amount of the operation member 31 required for moving the seat body 20 from the reclining position to the turning position is larger than an operation amount of the operation member 31 required for moving the seat body 20 from one reclining position to another reclining position. That is to say, in order to move the seat body 20 to the turning position at which the seat body 20 can be turned, the operation member 31 must be operated with a larger operation amount. Thus, the seat body 20 can be efficiently prevented from being unintentionally moved to the turning position.

In particular, according to this embodiment, the step (difference) is formed between the surface 57 a of the pedestal 50 in which the locking holes 56 a are formed, and the surface 55 c of the pedestal 50 in which the turning-position locking holes 56 b are formed. By means of such a simple structure, the present invention can achieve that a lifting amount (retracting amount) of the projecting members 32, i.e., an operation amount of the operation member 31 from the initial position, which is required for moving the seat body 20 between the reclining positions differs from a lifting amount of the projecting members 32 which is required for moving the seat body 20 from the reclining position to the turning position.

In addition, according to this embodiment, the seat body 20 is provided with the operation-amount adjusting mechanism 40 having the contacting and regulating member 42 that can be positioned on the position pa1 at which the contacting and regulating member 42 is in contact with the operation member 31 so as to regulate the movement of the operation member 31, whereby an operation amount of the operation member 31 can be not less than the first operation amount but be less than the second operation amount. According to the operation-amount adjusting mechanism 40, the seat body 20 can be efficiently prevented from being unintentionally moved to the turning position.

In particular, according to this embodiment, the operation member 31 includes the wall part 37 that is structured as a lever swingable about an axis in parallel with the movement path mr of the contacting and regulating member 42. The wall part 37 can be brought into contact with and separated from the movement path mr in accordance with the swinging motion of the operation member 31. In addition, the wall part 37 has the projecting part and the recessed part along the movement path mr of the contacting and regulating member 42. Thus, by means of the simple operation, i.e., by moving the contacting and regulating member 42, the swingable (operable) range of the operation lever 31 from the initial position can be varied.

Further, according to this embodiment, once the deregulating member 41 is operated, the contacting and regulating member 42 can be maintained on the second position pa by the holding lever 43. Thus, the operation of the seat body 20 toward the turning position can be significantly facilitated, as well as the seat body 20 can be efficiently prevented from being unintentionally moved to the turning position.

Further, the deregulating member 41 is disposed in the vicinity of the operation member 31. Thus, it is very easy to operate the operation member 31 and the deregulating member 41 so as to move the seat body 20 to the turning position. In addition, since the deregulating member 41 is disposed in the vicinity of the operation member 31, when the seat body 20 is moved to the turning position, it can be efficiently prevented that the user fails to operate the deregulating member 41.

Moreover, since the plane (vertical plane) including the operation direction of the operation member 31 and the plane (substantially horizontal plane) including the operation direction of the deregulating member 41 are perpendicular to each other, the operation direction of the operation member 31 and the operation direction of the deregulating member 41 are oriented differently from each other. More strictly, the swinging axis line dl of the operation lever 31 and the swinging axis line d3 of the deregulating member 41 are substantially perpendicular to each other, whereby the operation direction (upward direction) of the operation lever 31 and the operation direction (substantially lateral direction) of the deregulating lever 41 are substantially perpendicular to each other. Thus, it can be efficiently prevented that the deregulating member 41 is accidentally operated when the operation member 31 is operated, or that the operation member 31 is accidentally operated when the deregulating member 41 is operated.

Next, operations of the lifting mechanism 30 and the operation-amount adjusting mechanism 40 when the seat body 20 is shifted from the backward facing condition to the forward facing condition. When the seat body 20 is shifted from the backward facing condition to the forward facing condition, the seat body 20 is turned (reversed) by 180° on the turning position, and is then moved from the turning position to one reclining position.

As described above, when the seat body 20 is moved from one reclining position to the turning position, the operation member 31 is swung as much as possible within the swingable range, with the contacting and regulating member 42 being located on the second position pa2. According to this operation, the disengaging part 38 of the operation member 31 presses the projecting part (projection for disengagement) 43 c of the holding lever 43, so that the holding lever is swung to the position outside the movement path mr of the contacting and regulating member 420. Thus, due to the urging force via the deregulating member 41, the contacting and regulating member 42 is separated from the second position pa2 and is moved toward the first position pa1.

However, when the projecting member 32 is inserted in the turning-position locking hole 56 b, the projecting member 32 is in contact with the bottom surface of the turning-position locking hole 56 b. Thus, the operation member 31 is not returned up to the initial position (see, FIG. 16) but is located on the intermediate position (see, FIG. 19). As shown in FIG. 23, when the operation member 31 is located on the intermediate position, the third stopper part 37 c is located above the elongated hole 33 a of the support base 33 through which the contacting and regulating member 42 penetrates.

Thus, as shown in FIG. 23, when the seat body 20 is in the backward facing condition, the contacting and regulating member 42 is located on a position pa3 between the first position pa1 and the second position pa2. In the condition shown in FIG. 23, the operation member 31 of the lifting mechanism 30 can be swung until the contacting and regulating member 42 comes into contact with the wall part 37 at the second stopper part 37 b. Thus, when the seat body 20 is in the backward facing condition, by operating the operation member 31 of the lifting mechanism 30, the projecting members 32 can exit from the turning-position locking holes 56 b, without operating again the deregulating member 41 of the operation-amount adjusting mechanism 40. Therefore, the turning motion of the seat body 20 with respect to the pedestal 50 on the turning position, and the sliding motion of the seat body 20 with respect to the pedestal 50, become possible.

In the above manner, the condition of the seat body 20 can be shifted from the backward facing condition to the forward facing condition. As shown in FIG. 16, when the seat body 20 takes the forward facing condition and the projecting members 32 are inserted into any pair of the locking holes 56 a, the operation member 31 is returned to the initial position. As shown in FIG. 21, in accordance with the return of the operation member 31 to the initial position, the contacting and regulating member 42 is moved up to the first position. Thus, when the seat body 20 is again shifted to the backward facing condition, it is necessary to operate the operation-amount adjusting mechanism 40, whereby the seat body 20 can be efficiently prevented from being unintentionally moved to the turning position, while the excellent operability is acquired.

[Fixation onto Vehicle Seat]

Next, an operation for fixing the child car seat 10 (child car seat body 11) onto the vehicle seat 1 and structures relating thereto are described.

As described above, the child car seat 10 can be mounted on the vehicle seat 1 by fixing the pedestal 50 onto the vehicle seat 1 with the use of the seatbelt 5 provided on the vehicle seat 1. At this time, the base part 51 of the pedestal 50 is placed on the seat part la of the vehicle seat la, and the standing part 52 of the pedestal 50 is opposed to the back part 1 b of the vehicle seat 1.

As shown in FIG. 3, the seat belt 5 includes the shoulder belt 6 b extending downward obliquely, and the waist belt 6 a extending laterally. In this embodiment, as described above, the standing part 52 of the pedestal 50 is provided with the lock-off devices 79 for clamping the shoulder belt 6 b, and the standing part 52 of the pedestal 50 is fixed on the seat body 20 by the shoulder belt 6 b. In addition, the pedestal 50 also has the waist-belt guide part 70 that guides the waist belt 6 a. The waist-belt guide part 70 extends over the front surface 51 a and the opposed side surfaces 51 b of the base part 51 of the pedestal 50. In such a structure, as shown in FIG. 3, by connecting a movable buckle 6 c, which is located on a position at which the shoulder belt 6 b clamped by the lock-off devices 79 and obliquely traversing the standing part 52 and the waist belt 6 a extending around the base part 51 are merged to each other, to a stationary buckle 6 d fixed on the vehicle, the child car seat 10 can be placed on the vehicle seat 1.

Herebelow, the structure and the operation of the waist-belt guide part 70 are described in more detail. As shown in FIG. 24, the waist-belt guide part 70 includes a front guide part 71 extending on the front surface 51 a of the base part 51, and side guide parts 72 continuous to the front guide part 71 and extending on the side surfaces 51 of the base part 51. The waist-belt guide part 70 is configured to guide the waist belt 6 a on the base part 51. The front guide part 71 and the side guide part 72 are formed to have a groove-like shape as a whole. An upper edge UE defining the front guide part 71 and the side guide parts 72 from above, and a lower ledge LE defining the front guide part 71 and the side guide parts 72 from below, are substantially defined by steps (differences).

According to such a waist-belt guide part 70, the waist belt 6 a can be stably held at substantially a constant position. In this manner, by surrounding the base part 51 of the pedestal 50 by the waist belt 6 a from the front surface 51 a and the side surfaces 51 b, the child car seat (child car seat body 11) can be stabilized, particularly in the front and back direction, on the vehicle seat 1.

As shown in FIGS. 9 and 24, the pedestal 50 further includes a pair of lateral guide members 75 respectively projecting outward in the lateral direction from the side surfaces 51 b of the base part 51. Each of the lateral guide member 75 includes a laterally projecting part 76 laterally projecting from the side surface 51 b of the base part 51, and an upwardly extending part 77 extending upwardly from the laterally projecting part 76. As shown in FIGS. 3, 24 and so on, the laterally projecting part 76 of the lateral guide member 75 forms at least a portion of the lower edge LE defining the side guide part 70 from below. The upwardly extending part 77 of the lateral guide member 75 is configured to regulate the laterally outward displacement of the waist belt 6 a positioned on the side guide part 72.

As shown in FIG. 24, the lower edge LE of the side guide part 72 is located on an uppermost position in a part defined by the laterally projecting part 76 along a normal line nd relative to the bottom surface 51 c of the base part 51, which is placed on the vehicle body 1. The laterally projecting part 76 of the lateral guide member 75 forms a portion of the lower edge LE of the side guide part 72, which is most distant from the front guide part 71, i.e., the most backward part of the lower edge LE.

According to this structure, when the waist belt 6 a passes the lateral guide member 75 toward the connection point between the stationary buckle 6 c and the movable buckle 6 d, and when the waist belt 6 a passes the lateral guide member 75 toward a starting point (fixing point to the vehicle) of the waist belt 6 a, the waist belt 6 a extends obliquely downward. Thus, the waist belt 6 a not only presses backward the pedestal 50, i.e., the child car seat 10 onto the vehicle seat 1, but also presses downward the pedestal 50 (child car seat 10) onto the vehicle seat 1. Thus, the pedestal 50 (child car seat 10) can be fixed onto the vehicle seat 1 in a well-balanced manner.

In particular, it is preferable that a position of the lower edge LE of the side guide part 72 is gradually elevated along the normal line direction nd relative to the bottom surface 51 c of the base part 51, as a point of the lower edge LE approaches from the connection position between the side guide part 72 and the front guide part 71 toward the part formed by the laterally projecting part 76. In this case, the waist belt 6 a can extend in the side guide part 72 without trouble, and thus the waist belt 6 a of the seat belt 5 can be made resistant to be detached from the waist-belt guide part 70. As shown in FIG. 24, it is more preferable that the side guide part 72 is formed as a groove that is substantially defined by steps (differences), and a stepped surface 73 forming the step is smoothly connected to an upper surface 76 a of the laterally projecting part 76 of the lateral guide member 75. Thus, the waist belt 6 a can extend in the side guide part 72 without any trouble, and thus the waist belt 6 a can be made resistant to be detached from the waist-belt guide part 70.

In addition, as shown in FIG. 24, a width from the upper edge UE defining the side guide part 72 from above to the lower edge LE defining the side guide part 72 from below gradually narrows as a point of the width approaches the portion where the lower edge LE is formed by the laterally projecting part 76 from a side of the front surface 51 a of the base part 51. According to this structure, the direction in which the waist belt 6 a extends from the front to the back can be easily changed from the obliquely upward direction to the obliquely downward direction, in the upper surface 76 a of the laterally projecting part 76 of the lateral guide member 75. Thus, the position of the waist belt 6 a in the side guide part 72 can be stabilized, and the waist belt 6 a can be made resistant to be detached from the waist-belt guide part 70.

As described above, the upwardly extending part 77 of the lateral guide member 75 is configured to regulate the waist belt 6 a located on the side guide part 72 from being displaced laterally outward. Namely, according to the upwardly extending part 77, the displacement of the waist belt 6 a from the side guide part 72 can be efficiently prevented, in an area in which the height of the lower edge LE along the normal line direction nd relative to the bottom surface 51 c of the base part 51 becomes highest so that the inclination angle of the waist belt 6 a varies, whereby the waist belt 6 a is likely to be displaced. Thus, the pedestal 50 (child car seat 10) can be stably fixed onto the vehicle seat 1.

At least a portion of the upper edge UE defining the side guide part 72 from above is formed of a folded member 74 that projects laterally from the side surface 51 b of the base part 51 and further extends downward. In particular, in this embodiment, in an area where the side projecting member 76 is formed and in the vicinity of this area, the folded member 74 is formed. Thus, in the area where the inclination angle of the waist belt 6 a varies and in the vicinity of the area, the waist belt 6 a can be held at substantially a constant position by the side guide part 72.

As shown in FIG. 24, it is preferable that a position of a top part 77 a of the upwardly extending part 77 along the normal line direction nd relative to the bottom surface 51 c of the base part 51 is located on the same height position as, or slightly lower than, a position along the normal line direction nd of the upper edge UE of the side guide part 72 in which the lower edge LE is formed by the laterally projecting part 76. In particular, in the illustrated example, the position of the top part 77 a of the upwardly extending part 77 and the part of the upper edge UE of the side guide part 72, where the lower edge LE is formed by the laterally projecting part 76, are located on substantially the same position along the normal line direction nd. When the upwardly extending part 77 is formed as described above, the waist belt 6 a can be efficiently prevented from escaping laterally outward, as well as the waist belt 6 a can be easily set in the side guide part 72. Namely, the child car seat 10 can be easily mounted on the vehicle seat 1, and the child car seat 10 can be stably held on the vehicle seat 1.

[Support Leg]

Next, the support leg 100 and the structure of the child car seat body 11 relating to the support leg 100 are described.

The support leg 100 includes a fitting part 101 capable of being fitted in the pedestal 50, and a leg part 110 fixed on the fitting part 101 at a constant angle with respect to the fitting part 101.

Herein, the “constant angle” means that the extending direction of the leg part 110 with respect to the fitting part 101 cannot be varied. Thus, a structure in which the leg part 110 is swingable with respect to the fitting part 101 is excluded. However, some inevitable angle variation caused by a play among the respective members is omitted, and the angle between the leg part 110 with respect to the fitting part 101 is considered as constant.

As shown in FIG. 3, the support leg 100 is mounted on the pedestal 50 and extends between the floor surface 3 of the vehicle on which the vehicle seat 1 is installed, and the pedestal 50. As a result, the support leg 100 can support a front part of the child car seat body 11 mounted on the vehicle seat 1 from the floor surface 3. In order to assure versatility of the support leg 100 to vehicles, a length of the leg part 110 can be varied.

At first, the structure of the support leg 100 is described.

As can be understood from FIG. 26, the fitting part 101 includes a tubular member 102 formed to have a U-shape, in more detail, a metal cylindrical pipe. As shown in FIG. 27, the opposed ends of the tubular member 102 can be inserted into the pedestal 50 so as to be fitted in the pedestal 50. A through-hole is formed in a side surface of the tubular member 102 in an end area thereof. The tubular member 102 has therein a fitting projection 103 whose distal end projects from the through-hole. In addition, an urging member 104, such as a flat spring, is disposed in the tubular member 102. The urging member 104 presses the fitting projection 103 such that the fitting projection 103 is urged to project outward from the tubular member 102.

As shown in FIG. 27, the pedestal 50 further includes a bottom plate 91 forming the bottom surface 51 c, and an accommodating member 93 fixed on the bottom plate 91 so as to accommodate the tubular member 102 of the fitting part 101. The accommodating member 93 is provided with a through-hole 93 a capable of receiving the fitting projection 103 of the fitting part 101. The accommodating member 93 is formed of, e.g., a metal square pipe or a metal circular pipe. As shown in FIG. 1, the front surface 51 a of the pedestal 50 is provided with insertion openings 94 through which the tubular member 102 of the fitting part 101 passes.

The bottom plate 91 has fitting disengaging members 92 disposed on positions opposed to the through-holes 93 a of the accommodating member 93. When operated, the fitting disengaging member 92 can push the fitting projection 103 projecting into the through-hole 93 a inside the accommodating member 93. As shown in FIG. 26, the fitting releasing part 92 is connected to a part of the bottom plate 91 other than the fitting releasing part 92 at a portion of an outer profile of the fitting releasing part 92. In a part other than the part of the outer profile, the fitting releasing part 92 is disconnected from the part of the bottom plate 91 other than the fitting releasing part 92. Thus, the fitting releasing part 92 is structured as a tongue-like part that is warped with respect to the part of the bottom plate 91 other than the fitting engaging part 92 so that the fitting releasing part 92 can be brought into contact with the fitting projection 103.

As shown in FIG. 27, the tubular member 102 of the fitting part 101 is connected to the leg part 110 at a constant angle via a reinforcing plate 105. The fitting part 101 and leg part 110 are secured to each other by welding. On the connection portion between the fitting part 101 and the leg part 110, a protective cover 106 for covering the connection portion is provided.

Next, the leg part 110 is described. The leg part 110 includes a first tubular member 111, a second tubular member 113 which can be slid with respect to the first tubular member 111, and a positioning mechanism 120 that fixes the second tubular member 113 relative to the first tubular member 111.

One end of the first tubular member 111 is connected to the tubular member 102 of the fitting part 101, and the other end thereof is connected to the positioning mechanism 120. The second tubular member 113 is inserted into the first tubular member 111 from one end thereof. The second tubular member 113 is configured to be slidable in the first tubular member 111. A leg end 118 to be in contact with the floor surface 3 is disposed on the other end of the second tubular member 113.

As shown in FIG. 31, both of the first tubular member 111 and the second tubular member 113 may be formed of a metal cylindrical pipes. A pair of holes 113 a are formed in the second tubular member 113 in positions opposed to each other. Here, the plural pairs of holes 113 a are formed with intervals therebetween in a sliding direction of the second tubular member 113 with respect to the first tubular member 111 (longitudinal direction of the second tubular member 113) (see, FIGS. 28 and 29). As shown in FIG. 29, each hole 113 a is formed as an elongated hole that extends in a direction perpendicular to the sliding direction of the second tubular member 113 with respect to the first tubular member 111 (longitudinal direction of the second tubular member 113). In addition, the second tubular member 113 is provided with an elongated groove 113 b for preventing rotation that extends in the sliding direction of the second tubular member 113 with respect to the first tubular member 111 (longitudinal direction of the second tubular member 113).

On the other hand, the positioning mechanism 120 includes a housing 121 and a slider 125 that can be slid with respect to the housing 121. The other end of the first tubular member 111 is fixed to the housing 121. As shown in FIGS. 29 and 30, the housing 121 has a projection 122 for preventing rotation, which can be engaged with the groove 113 b for preventing rotation of the second tubular member 113. Owing to the engagement between the groove 113 b for preventing rotation and the projection 122 therefor, the rotation of the second tubular member 113 with respect to the housing can be prevented, whereby the holes 113 a of the second tubular member 113 are opened in the same direction.

The slider 125 has a through-pin 126 that extends along the sliding direction with respect to the housing 121. When the slider 125 enters the housing 121, the through-pin 126 can pass through one pair of the plural pairs of elongated holes 113 a so as to penetrate through the second tubular member 113. When the through-pin 126 penetrates through the second tubular member 113, the second tubular member 113 can be fixed onto the first tubular member 111.

As shown in FIGS. 29 to 31, the slider 125 further includes a slide guide member 127 that extends along the sliding direction with respect to the housing 121. Formed in the slide guide member 127 is an elongated hole 127 a that extends along a longitudinal direction of the slide guide member 127. On the other hand, the housing 121 is provided with a first guide projection 123 a extending through the elongated hole 127 a of the slide guide member 127, and a second guide projection 123 b disposed so as to be opposed to the first guide projection 123 a. As shown in FIG. 31, the first guide projection 123 a is opposed to the through-pin 126 of the slider 125 from one side. In addition, the second guide projection 123 b surrounds the through-pin 126 from three sides. In such a structure, when the first guide projection 123 a and the second guide projection 123 b of the housing 121, and the through-pin 126 and the slide guide member 127 of the slider 125, are engaged with each other, the slider 125 can be slid with respect to the housing 121 only in one direction.

As shown in FIG. 30, engagement projections 127 b are formed on the slide guide member 127, and engagement parts 124 engageable with the engagement projections 127 b are formed on the housing 121. When the engagement projections 127 b of the slide guide member 127 and the engagement parts 124 of the housing 121 are engaged with each other, the through-pin 126 is held so as to penetrate through the second tubular member 113. However, the engagement between the engagement projections 127 b of the slide guide member 127 and the engagement parts 124 of the housing 121 can be easily disengaged by applying an external force for drawing the slider 125 out of the housing 121 along the sliding direction of the slider 125.

In this embodiment, as shown in FIG. 30, the engagement part 124 is formed as a projection extending from the housing 121. The engagement part 124 is elastically deformable, so that the engagement projection 127 b of the slide guide member 127 can be moved over the engagement part 124. Since the engagement projection 127 b that has once moved over the engagement part 124 is engaged with the engagement part 124, the through-pin 126 is maintained so as to penetrate through the second tubular member 113 until an external force is applied to the slider 125.

In a cross-section in parallel with the sliding direction of the slider 125, the cross-section being in parallel with the projecting direction of the engagement projection 127 b from the slide guide member 127 (i.e., the cross-section shown in FIG. 30), the engagement part 124 has a V shape so as to guide the movement of the engagement projection 127 b along the sliding direction of the slider 125. Thus, the engagement projection 127 b can be smoothly engaged with the engagement part 124, so that the operation of the slider 125 can be stably performed.

Next, the operation of the support leg 100 as structured above is described. At first, a case in which the support leg 100 is mounted on the pedestal 50 is described.

When the support leg 100 is mounted on the pedestal 50, the ends of the tubular member 102 of the fitting part 101 are inserted and pushed into the insertion openings 94 of the pedestal 50. As a result, the end region of the tubular member 102 is inserted into the cylindrical accommodating member 93 disposed in the base part 51 of the pedestal 50. Finally, the fitting projection 103 urged to project from the tubular member 102 is received in the through-hole 93 a of the accommodating member 93. In this manner, the fitting part 101 of the support leg 100 is fitted in the pedestal 50, so that the support leg 100 is mounted on the child car seat body 11

According to the support leg 100, since the leg part 110 is fixed on the fitting part 101 such that a constant angle is defined with respect to the fitting part 101, the rigidity of the support leg 100 is remarkably improved. Thus, the child car seat body 11 of the child car seat, i.e., the pedestal 50 and the seat body 20 can be stably held on the vehicle seat 1.

In addition, in the positioning mechanism 120 for fixing the second tubular member 113 onto the first tubular member 111, the through-pin 126 of a circular cross-section of the slider 125 penetrates through the pair of holes 113 a formed in the opposed positions of the second tubular member 113. That is to say, since the through-pin 126 penetrates through the second tubular member 113, the second tubular member 113 can be securely fixed on the first tubular member 111. Thus, the child car seat 10 (the pedestal 50 and the seat body 20) can be more stably held on the vehicle seat 1.

Since the fitting part 101 and the leg part 110 are fixedly and highly rigidly connected to each other, there is a possibility that an outer force might be intensively applied to the positioning mechanism 120 having the movable member. However, as described above, since the through-pin 126 penetrates through the second tubular member 113 via the pair of holes 113 a so that the second tubular member 113 is securely fixed onto the first tubular member 111, there is no problem.

Although the through-pin 126 must penetrate through the pair of holes 113 a formed in the second tubular member 113, the pair of holes 113 a are formed as elongated holes such that a cross-sectional area of the hole 113 a is larger than a required area through which the through-pin 126 penetrates. Thus, it is easy to operate the slider 125 so as to allow the through-pin 126 to penetrate through both of the through-holes 113. Thus, length adjustment of the leg part 110 with the use of the positioning mechanism 120 can be easily performed.

Meanwhile, the elongated hole 113 a of the second tubular member 113 does not extend in the sliding direction of the second tubular member 113 with respect to the first tubular member 111 (longitudinal direction of the second tubular member 113). Thus, after the through-pin 126 has penetrated through the second tubular member 113, the leg part 110 can be maintained a constant length. On the other hand, the elongated hole 113 a of the second tubular member 113 extends in the direction perpendicular to the sliding direction of the second tubular member 113 with respect to the first tubular member 111 (longitudinal direction of the second tubular member 113). However, the groove 113 b for preventing rotation, which is formed in the second tubular member 113, and the projection 122 for preventing rotation, which is formed on the housing 121, are engaged with each other. Thus, the second tubular member 113 and the through-pin 126 can be prevented from relatively moving to each other in the longitudinal direction of the elongated hole 113 a.

Further, since the second tubular member 113 is securely fixed onto the first tubular member 111, the housing 121 can be prevented from being largely deformed. Thus, it is sufficient that the housing 121 and the slider 125 are locked with each other by a simple mechanism. For example, as described above, the slider 125 and the housing 121 may be engaged with each other such that the slider 125 and the housing 121 can be disengaged from each other by applying an external force in the sliding direction of the slider 125, and the through-pin 126 is maintained to penetrate through the second tubular member 113. To be more specific, the following structure is possible. Namely, a projection is formed on one of the slider 125 and the housing 121, and an engagement part engageable with the projection is formed on the other of the slider 125 and the housing 121. When the projection and the engagement part are engaged with each other, the through-pin 126 can be held to penetrate through the second tubular member 113. In the example shown in FIG. 30, the engagement part is formed as the projection having a V-shaped cross-section. However, not limited thereto, the engagement part may be formed as a recess for receiving the engagement projection 127 b.

Next, a case in which the support leg 100 is removed from the pedestal 50 is described. In this case, the fitting disengagement part 92 formed of a part of the bottom plate 91, typically formed of a resin, is pressed. By this operation, the fitting projection 103 is pressed into the accommodating member 93, and the fitting part 101 can be withdrawn from the inside of the pedestal 50 while gripping the protective cover 106, for example. In this manner, the support leg 100 can be detached from the pedestal 50 (child car seat body 11). Thus, without touching the accommodating member 93 which may be formed of a metal pipe or the like, and without touching the tubular member 102 and the fitting projection 103 of the fitting part 101 which may be made of metal, the fitting state of the fitting part 101 in the pedestal 50 can be released so that the support leg 100 can be detached from the pedestal 50 (child car seat 10). Thus, the support leg 100 can be removed from the pedestal 50 (child car seat 10) at ease.

Although the one embodiment of the present invention is described hereabove, the present invention can be naturally, variously modified within the scope of the present invention. 

1. A child car seat comprising: a pedestal to be mounted on a seat of a vehicle; and a seat body supported on the pedestal so as to be slidable with respect to the pedestal; wherein: a plurality of reclining positions at which the seat body is supported at different inclination angles, and a turning position at which the seat body can be turned on the pedestal, are included in a range within which the seat body can be slid; the seat body includes: a retractable projecting member projecting toward the pedestal; and an operation member connected to the projecting member, the operation member being capable of, when operated, adjusting a projecting amount of the projecting member; and the projecting member is configured to be engaged with the pedestal such that the projecting member can be held in the respective plurality of reclining positions and the turning position; and a first operation amount of the operation member, which is required for disengaging the engagement between the projecting member and the pedestal and for sliding the seat body between the plurality of reclining positions, is smaller than a second operation amount of the operation member, which is required for disengaging the engagement between the projecting member and the pedestal and for sliding the seat body from one of the plurality of reclining positions to the turning position.
 2. The child car seat according to claim 1, wherein: formed in the pedestal are: a plurality of locking holes for receiving the projecting member, the locking holes being capable of holding the seat body at the respective plurality of reclining positions by receiving the projecting member; and a turning-position locking hole for receiving the projecting member, the turning-position locking hole being capable of holding the seat body at the turning position by receiving the projecting member; and a step is formed between a surface of the pedestal in which the plurality of locking holes are formed and a surface of the pedestal in which the turning-position locking hole is formed.
 3. The child car seat according to claim 2, wherein the plurality of locking holes are formed in a bottom surface of a recessed part formed in a surface of the pedestal in which the turning-position locking hole is formed.
 4. The child car seat according to claim 1, wherein the seat body further includes an operation-amount adjusting mechanism having: a contacting and regulating member capable of being moved between: a first position at which the contacting and regulating member is in contact with the operation member so as to regulate the movement of the operation member, such that an operation amount of the operation member is not less than the first operation amount but less than the second operation amount; and a second position at which an operation amount of the operation member is allowed to be not less than the second operation amount; and a deregulating member connected to the contacting and regulating member, the deregulating member allowing, when operated, the movement of the contacting and regulating member from the first position to the second position.
 5. The child car seat according to claim 4, wherein: the operation member is structured as an operation lever that can be swung about an axis in parallel with a movement path of the contacting and regulating member between the first position and the second position; the operation member has a wall part located on a position opposed to the movement path, the wall part being capable of moving toward and moving away from the movement path in accordance with a swinging motion of the operation lever; and a portion of the wall part opposed to the first position more projects toward the movement path than a portion of the wall part opposed to the second position.
 6. The child car seat according to claim 4, wherein: the deregulating member is positioned in the vicinity of the operation member.
 7. The child car seat according to claim 4, wherein: the operation-amount adjusting mechanism further includes a swingable holding lever that extends on the movement path of the contacting and regulating member between the first position and the second position; and the holding lever is configured to allow the movement of the contacting and regulating member from the first position to the second position, and to hold the contacting and regulating member on the second position until the holding lever is subjected to an external force so as to be swung to a position outside the movement path.
 8. The child car seat according to claim 7, wherein: the operation member includes a disengaging part that is brought into contact with the holding lever, when the operation member is moved from a position at which the projecting member is located after having moved, by the first operation amount, from an initial position at which the projecting member is engaged with the pedestal so that the seat body is held on one of the plurality of reclining positions, to a position at which the projecting member is located after having moved from the initial position by the second operation amount; and the holding lever is pressed by the disengaging part of the operation member so as to release the contacting and regulating member held on the second position.
 9. The child car seat according to claim 8, wherein: when the projecting member is engaged with the pedestal so that the seat body is fixed on the turning position, the operation member is located at an intermediate position that is located in the course of the movement path along which the operation member is returned to the initial position; and the operation member further includes a stopper that is located, when the operation member is located at the intermediate position, on a position of the movement path of the contacting and regulating member between the first position and the second position so as to regulate the movement of the contacting and regulating member toward the first position.
 10. The child car seat according to claim 9, wherein: formed in the pedestal are: a plurality of locking holes for receiving the projecting member, the locking holes being capable of holding the seat body at the respective plurality of reclining positions by receiving the projecting member; and a turning-position locking hole for receiving the projecting member, the turning-position locking hole being capable of holding the seat body at the turning position by receiving the projecting member; and the turning-position locking hole is formed as a bottomed hole having a bottom with which the projecting member is brought into contact.
 11. The child car seat according to claim 4, wherein a plane including an operation direction of the operation member and a plane including an operation direction of the deregulating member are perpendicular to each other.
 12. The child car seat according to claim 5, wherein the deregulating member is structured as a deregulating lever that can be swung about an axis perpendicular to the swinging axis of the operation member.
 13. The child car seat according to claim 1, wherein: the operation member is connected to the projecting member via a link mechanism; and a retracting amount of the projecting member is dependent on an operation amount of the projecting member.
 14. A child car seat comprising; a child car seat body to be mounted on a seat of a vehicle; and a support leg detachably attached to the child car seat body; wherein: the support leg includes a fitting part capable of being fitted in the child car seat body, and a leg part fixed to the fitting part at a constant angle with respect to the fitting part; the leg part includes: a first tubular member; a second tubular member at least a portion of which can be disposed in the first tubular member, the second tubular member being capable of being slid with respect to the first tubular member; and a positioning mechanism provided on the first tubular member, the positioning mechanism being configured to fix the second tubular member relative to the first tubular member; formed in the second tubular member are plural pairs of holes which are located in positions opposed to each other with intervals therebetween in a sliding direction of the second tubular member; each of the holes is formed as an elongated hole extending in a direction perpendicular to the sliding direction of the second tubular member; and the positioning mechanism includes: a housing fixed on the first tubular member; and a slider that can be slid with respect to the housing, the slider having a through-pin capable of passing through one pair of the plural pairs of holes so as to penetrate through the second tubular member.
 15. The child car seat according to claim 14, wherein: the child car seat body includes a bottom plate, and an accommodating member fixed on the bottom plate so as to accommodate the fitting part; the fitting part includes a fitting projection that is urged so as to project outward, the fitting projection being positioned in an area to be inserted into the accommodating member; and the accommodating member has a through-hole for receiving the fitting projection of the fitting part, and the bottom plate has a fitting releasing part disposed on a position opposed to the through-hole, the fitting releasing part being capable of, when operated, pushing the fitting projection projecting into the through-hole into the accommodating member.
 16. The child car seat according to claim 15, wherein: the fitting releasing part is connected to the bottom plate at a portion of an outer profile of the fitting releasing part, and is disconnected from the bottom plate at a portion other than the portion of the outer profile, and the fitting releasing part is warped with respect to the bottom plate so that the fitting releasing part can be brought into contact with the fitting projection.
 17. The child car seat according to claim 14, wherein the slider and the housing are engaged with each other such that the slider and the housing are disengaged from each other by applying an external force in a sliding direction of the slider, and the through-pin is held so as to penetrate through the second tubular member.
 18. The child car seat according to claim 17, wherein: a projection is formed on one of the slider and the housing, and an engagement part engageable with the projection is formed on the other of the slider and the housing; and when the projection and the engagement part are engaged with each other, the through-pin is held to penetrate through the second tubular member.
 19. The child car seat according to claim 14, wherein: one end of the first tubular member is fixed to the fitting part, and the housing of the positioning mechanism is fixed on the other end of the first tubular member; and by adjusting a length of the leg part by means of the positioning mechanism, an end of the second tubular member can be in contact with a floor surface of the vehicle.
 20. The child car seat according to claim 14, wherein the leg part is fixed to the fitting part by welding.
 21. A support leg to be attached to a child car seat body to be mounted on a seat of a vehicle so as to support the child car seat body, the support leg comprising: a fitting part capable of being fitted in the child car seat body; and a leg part fixed to the fitting part at a constant angle with respect to the fitting part; wherein the leg part includes: a first tubular member; a second tubular member at least a portion of which can be disposed in the first tubular member, the second tubular member being capable of being slid with respect to the first tubular member; and a positioning mechanism disposed on the first tubular member, the positioning mechanism being configured to fix the second tubular member relative to the first tubular member; formed in the second tubular member are plural pairs of holes which are located in positions opposed to each other with intervals therebetween in a sliding direction of the second tubular member; each of the holes is formed as an elongated hole extending in a direction perpendicular to the sliding direction of the second tubular member; and the positioning mechanism includes: a housing fixed on the first tubular member; and a slider that can be slid with respect to the housing, the slider having a through-pin capable of passing through one pair of the plural pairs of holes so as to penetrate through the second tubular member. 